The analysis of stator MMF and the calculation of rotor losses in a 12-phase high speed asynchronous generator

To research the influence of multi-phase winding to generators and calculate the losses in solid rotors, the stator MMF of a 12-phase asynchronous generator have been well analyzed and finite element method by ANSYS software has been applied to get the accurate losses in the rotor through both harmonic and transient 2-D analysis. The relationship between stator harmonic current and stator harmonic MMF has been deduced and proved through ANSYS software to some extent, and rotor losses produced by both stator fundamental current and stator total current have also been obtained and compared. The results show that 12-phase stator winding with appropriate short pitch can effectively eliminate or reduce many MMF produced by stator fundamental and harmonic current and rotor losses are mainly produced by stator fundamental current.